D12321VF25V Renesas Electronics America, D12321VF25V Datasheet - Page 616

• Manufacturer Part Number: D12321VF25V
• Description: IC H8S/2300 MCU ROMLESS 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of D12321VF25V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 86
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• For Use With: EDK2329 - DEV EVALUATION KIT H8S/2329
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 13 Watchdog Timer
13.2
13.2.1
TCNT is an 8-bit readable/writable *
When the TME bit is set to 1 in TCSR, TCNT starts counting pulses generated from the internal
clock source selected by bits CKS2 to CKS0 in TCSR. When the count overflows (changes from
H'FF to H'00), either the watchdog timer overflow signal (WDTOVF) *
interrupt (WOVI) is generated, depending on the mode selected by the WT/IT bit in TCSR.
TCNT is initialized to H'00 by a reset, in hardware standby mode, or when the TME bit is cleared
to 0. It is not initialized in software standby mode.
Notes: 1. TCNT is write-protected by a password to prevent accidental overwriting. For details
Rev.6.00 Sep. 27, 2007 Page 584 of 1268
REJ09B0220-0600
Bit
Initial value :
R/W
2. The WDTOVF pin function cannot be used in the F-ZTAT versions.
Register Descriptions
Timer Counter (TCNT)
see section 13.2.4, Notes on Register Access.
:
:
R/W
7
0
R/W
6
0
1
up-counter.
R/W
5
0
R/W
4
0
R/W
3
0
R/W
2
or an interval timer
2
0
R/W
1
0
R/W
0
0